Preparation of Cross-Linkable Waterborne Polyurethane-Acrylate Coating Films with Multifunctional Properties

Abstract

Self-migration or unstable phase inversion occurs when the application conditions are varied, which limits the application of polyurethane-acrylate (PUA) composite films. In this paper, cross-linked polyurethane/poly(methyl methacrylate-co-borneol acrylate) shell microspheres were prepared by using the seeded emulsion polymerization method. The core-shell structure of these samples was identified by dynamic light scattering (DLS) and high-resolution transmission electron microscope (HR-TEM). Moreover, HR-TEM images indicated that the core-shell structure of the microsphere does not undergo complete phase inversion. In addition, with increasing content of borneol acrylate in the shell, the water resistance and antibacterial adhesion of films were improved. The X-ray photoelectron spectroscopy (XPS), Energy Dispersive Spectrometer (EDS), water contact angle (CA) measurements, antibacterial and anti-adhesion tests demonstrate that the C/N ratios of films from the inside to the upper surface had an obvious gradient in growth, indicating the shell component (polyborneol acrylate) was predominantly present at the surface of films after coalescence in cross-linked core-shell PUA. It was found that a suitable degree of cross-linking contributes to the segregation of the hydrophobic component (borneol groups) on the film surface. As a consequence, the excellent water resistance, cytocompatibility, and antibacterial properties endowed this series of polymer materials with promising application potential in the biomedical field.

A simple method to prepare superhydrophobic and regenerable antibacterial films

“…Contact angle and bacterial growth tests indicated that the surfaces also retained superhydrophobicity, bactericidal and anti-adhesion characteristics. Some studies show that the traditional antibacterial film can achieve antibacterial effect by sterilization [57] and anti-adhesion [58]. Superhydrophobic antibacterial film can combine the functions of sterilization and anti-adhesion [59].…”

Coatings and the environment: a review of problems, progress and prospects

“…The salt spray test shown by Soleimani et al [56] indicated that adding silica leads to increased anti-corrosionproperties up to 3 wt%, after which there is a decline in the anticorrosion property [56]. Chen et al [57], using modified poly dimethyl siloxane (PDMS) with selfhealing properties as coatings on cold-rolled steel and dipping it in 3.5% NaCl for ten days, discovered that no corrosion occurred on the steel of the self-healing property. This protective ability against corrosion that the healable silicone exhibited could be used for marine metal protection.…”

Self-Assembly of Amphiphilic Linear−Dendritic Carbosilane Block Surfactant for Waterborne Polyurethane Coating

“…where "X" is the fraction (%) of the carbamate carbonyl functional group in the sum of carbamate carbonyl and urea carbonyl functional groups, "A" is the absorbance, "a" is the molar absorption coefficient, and the subscripts "o" and "n" are the carbamate carbonyl and urea carbonyl, respectively. The main reaction ratio can be calculated according to the area of carbonyl absorption peak of carbamate and the area of the urea carbonyl absorption peak in the infrared spectrum using Equation (6).…”

“…The integration process is shown in Figures 6-9. The main reaction ratio can be calculated according to the area of carbonyl absorption peak of carbamate and the area of the urea carbonyl absorption peak in the infrared spectrum using Equation (6).…”

“…However, traditional solvent-based polyurethane coatings are changing to more environment-friendly waterborne coatings due to environmental pollution concerns [4,5]. The two-component waterborne polyurethane coatings are generally composed of a base and hardener [6]. The main components of the base are hydroxyl polyacrylate dispersion, pigments, additives and water.…”